What order do the Green Ember books go in?

I'm curious, could you please clarify the sequence in which the Green Ember books should be read? I understand they're a popular series, but I'm unsure of the correct order to follow for a comprehensive understanding of the storyline and character development. Is there a specific order in which they're intended to be read, or can they be read out of order without losing too much context? I'd appreciate your guidance on this matter.